I have 4 s-1's and no swapping of cables or psu's gets that bottom light to come on.
I have to think the card is dead. I would prefer a complete and new machine ,
but if he ships me a controller/ethernet card I could swap it. I have a lot of tools and parts.
I sent an email to sushi-review for help on this as it truly appears to be a dead part.
Problem with a new machine is 4-5 days at least missing mining while you send it back to get a return. And you gotta pay to send it back, the faster you want them to get it the more it cost. damn
well I will wait for a reply . in the meantime I may go to this seller as he is usa based
https://bitcointalksearch.org/topic/antminers4-1250-bitmains-official-partner-official-north-america-distributor-377632
https://ninjatech.org/